Toshiba Electronics Europe has launched two new S300 hard disk drives for small and medium scale surveillance applications. The new models, available in 4TB and 6TB, leverage shingled magnetic recording (SMR) technology to offer higher density storage solutions. The number of high-definition (HD) camera streams has been doubled from 32 to 64. The buffer size has been increased to 256MB, thereby enabling smoother data transfer from high-resolution cameras. The two additional S300 models are available now.
Source: https://www.helpnetsecurity.com/2021/05/11/toshiba-s300-hdd/